package com.itheima.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.pojo.BaseContext;
import com.itheima.pojo.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();




    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;


        String[] includeUrls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/sendMsg",
                "/user/login"


        };

        String requestURI = request.getRequestURI();
        System.out.println(requestURI);
        boolean flag = flag(includeUrls, requestURI);
        if (flag){
           filterChain.doFilter(request,response);
           return;
        }
        if (request.getSession().getAttribute("employee")!=null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("employee"));
            BaseContext.setCurrentId((Long) request.getSession().getAttribute("employee"));
            filterChain.doFilter(request,response);
            BaseContext.remove();
            return;
        }
        if(request.getSession().getAttribute("user") != null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("user"));

            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);

            filterChain.doFilter(request,response);
            return;
        }
            log.info("用户未登录");
            response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
            return;
    }

    @Override
    public void destroy() {

    }
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public static boolean flag(String[] a,String uri){
        for (String s : a) {
            boolean match = PATH_MATCHER.match(s, uri);
            if (match){
                return true;
            }
        }
        return false;
    }
}
